Question: What is safety classification and labelling of ferrous sulfate anhydrous, that has publishing house National Fire Protection Association has published?
Paraphrase: What is protection classification and labelling of ferrous sulfate anhydrous, that has publishing residence National Fire Protection Association has published?
SPARQL (Wikidata): SELECT ?answer WHERE { wd:Q214863 wdt:P4952 ?answer . ?answer wdt:P123 wd:Q1806416}
Answer: NFPA 704: Standard System for the Identification of the Hazards of Materials for Emergency Response